Copy onto a large sheet of paper (or several smaller sheets taped together) the game board shown below. Make sure that a counter will fit inside each square. Label equal sections of a spinner "10," "12," "15," "20," "24," "30," "40," "60."

Each partner places a counter on the "Start" square. One partner spins the spinner and substitutes the number on the spinner for x in the proportion . Then the other partner spins the spinner and substitutes the number on the spinner for y in the proportion. Each partner solves the proportion and moves his or her spinner the number of spaces given by the missing value. The first partner to reach the "End" square wins the round.